Assigning a Revision Level to a Document 
Prerequisites
You are processing the document with reference to a change number. A status that has the release indicator set for it is defined in the status network for the document type.
See:
Revision Level AssignmentProcedure
The further processing flow depends on the status network you have defined for the document type. For example:
– You may see the Log Field dialog box, which prompts you to make an entry.
– The document status that is interpreted as released may have the Locked or Original in work status type. In this case, the system tells you that you can no longer enter data in some of the fields. Only some of the functions can still be used, for example changing the status.
– The revision levels that have already been assigned to a document version
– The revision level that must be assigned next from the defined sequence.
The control data settings in Customizing determine how the revision level is assigned:
– If external assignment is defined, you see the next available revision level as a default value. You can overwrite this with any value.
– If internal assignment is defined, you see a dialog box that tells you which revision level is assigned to this version.
Result
A revision level always identifies a version uniquely because you can process a version with reference to one change number only.